American Geophysical Union

Old fractures caused rare 8.6 magnitude earthquake

On 11 April 2012, an 8.6 magnitude earthquake occurred 100 kilometers (62 miles) off the coast of Sumatra. This earthquake was unusual in that it originated within the plate rather than at a plate boundary. In fact, it is ...

Aug 31, 2012
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The Everglades still threatened by excess nutrients

Since 1985, a state agency has constructed and continues to maintain hundreds of square kilometers of wetlands built to regulate the amount of nutrients reaching the Everglades in southern Florida. But this is proving to ...

Aug 31, 2012
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Dams impact carbon dynamics in U.S. rivers

Dissolved organic carbon (DOC)—which leaches into freshwater systems from plants, soils, and sediments, and from other detritus present in the water itself—is the major food supplement for microorganisms and plays ...

Aug 08, 2012
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Turbulent forces within river plumes affect spread

When rivers drain into oceans through narrow mouths, hydraulic forces squeeze the river water into buoyant plumes that are clearly visible in satellite images. Worldwide, river plumes not only disperse freshwater, sediments, ...

Aug 08, 2012
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